import sys
#input = sys.stdin.readline
input = sys.stdin.buffer.readline #文字列はダメ
#sys.setrecursionlimit(1000000)
#import bisect
#import itertools
#import random
#from heapq import heapify, heappop, heappush
#from collections import defaultdict 
#from collections import deque
#import copy
#import math
#from functools import lru_cache
#@lru_cache(maxsize=None)
#MOD = pow(10,9) + 7
#MOD = 998244353
#dx = [1,0,-1,0]
#dy = [0,1,0,-1]

def main():
    A,B = map(int,input().split())
    if A == B:
        ans = 2*A
        print(ans);exit()
    if A > B:
        A,B = B,A
    
    ans = 1 + 2*A + (B-A-1) * 2
    print(ans)


if __name__ == '__main__':
    main()